ANGIOSPERMS. r2i 



terminates in a flower, after producing one or more lateral axes of a second order which 

 in their turn terminate in flowers and continue the system in this manner- the develop- 

 ment of each lateral shoot is stronger than that of the primary axis beyond the point of 

 origm (see Figs. 127, 128, pp. 158, 159). 



a. Cymose Inflorescences without a Pseud-axis: Two or more lateral axes are de- 

 veloped beneath each flower, terminating in flowers ; lateral axes of a higher 

 order continuing the system in the same manner. 



10. Ihe Anthela: An indefinite number of lateral axes are produced on 



each axis, and overtopping the primary axis develope in such a 

 manner that the entire inflorescence does not acquire any definite 

 shape {e.g. J uncus lamprocarpus, tenuis, alpinus, and Gerardi, Lunula 

 nemorosa, (fec^- The anthela of these genera, as well as of Scirpus 

 and Cyperus, exhibits a number of different transitional forms to the 

 panicle and even to the spike, and on the other hand to the formation 

 of cymose inflorescences with pseud-axes, e.g. in Juncus bufonius. 

 The inflorescence of Spircea Vlmaria is included in this form by 

 myself and others. 



11. The Cymose Umbel: A whorl of three or more equal axes springs from 



the primary one, secondary whorls of lateral axes being again pro- 

 duced from it, and the process being then again repeated (see Fig. 

 140, p. 168). The whole system resembles a true umbel in habit; 

 very good examples are aflbrded by several species of Euphorbia, 

 especially E. Lathyris and helioscopia. This form of cyme is not 

 essentially distinct from the next, and in the highest orders of 

 ^ branching commonly passes into it ; in Periploca grcEca, for example, 



even in the first ramification. 



12. T/je Dichasiufu : Each primary axis produces a pair of opposite or 



nearly opposite lateral axes, which in their turn produce pairs of 

 the second order, and so on. The whole system appears as if com- 

 posed of bifurcations, especially after the older flowers have fallen 

 oflf; as in Euphorbia, many Sileneae, some Labiatse, &c. The dicha- 

 sium easily passes, in the first or a succeeding or(^r of lateral axes, 

 into a sympodial mode of development. 



b. Cymose Inflorescetices ivith a Pseud-axis {Sympodial Inflorescences'). The axes of 

 each successive order bear only one lateral axis of the next order. The basal 

 portions of the consecutive orders of axes may lie more or less in a straight 

 line, and may become thicker than the flower-stalk (above the branching). 

 A pseud-axis or sympodium may thus become either straight or curved first 

 in one direction and then in another, the flowers appearing to be produced 

 on it as lateral shoots (see Fig. 128, A, B, D, p. 159). If the sympodium is 

 clearly developed, it resembles a spike or raceme, from which however it 

 is easily distinguished when bracts are present by their being apparently 

 opposite to the flowers (as in Helianthemum) ; but displacement not unfre- 

 quently causes it to assume a different form (as in Sedum). 



13. The Unilateral Helicoid Cyme is a sympodial cyme in which the median 



plane of each of the successive axes which constitute the system 

 is always situated on the same side, whether right or left, with re- 

 spect to the preceding one (see Fig. 128 Z)) ; as for instance, in the 



' Compare the careful description by Buchenau in Jahrb. fur wissensch. Bot. p. 393 et seq. and 

 PL 28-30. 



